Coffee maker



FIG. 1 is a perspective view of a coffee maker showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof; and

FIG. 8 is a perspective view thereof; and,

FIG. 9 is a perspective view thereof.

The broken line showing of two cups in FIGS. 8 and 9 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a coffee maker, as shown and described. 